CN112814865A - Pumping system and concrete pumping equipment - Google Patents
Pumping system and concrete pumping equipment Download PDFInfo
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- CN112814865A CN112814865A CN202110154906.9A CN202110154906A CN112814865A CN 112814865 A CN112814865 A CN 112814865A CN 202110154906 A CN202110154906 A CN 202110154906A CN 112814865 A CN112814865 A CN 112814865A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
- F04B11/0008—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
本发明公开了一种泵送系统及混凝土泵送设备，该泵送系统包括输送管路、动力机构、从输送管路引出的过渡缸、与过渡缸同轴的调节流体缸、分别设置于过渡缸以及调节流体缸中的过渡活塞和调节活塞、连接过渡活塞与调节活塞的连杆，泵送系统还包括：蓄能器，其用于存储和释放流体介质，蓄能器具有进口和出口；中间管路，其包括与蓄能器的进口连通的第一支路以及与蓄能器的出口连通的第二支路；阀组件，其包括设置于第一支路上的第一单向阀以及设置于第二支路上的第二单向阀；第一单向阀的出口与蓄能器的进口连通，第二单向阀的进口与蓄能器的出口连通；其中：使第一单向阀在大于第一设定压力时打开，第二单向阀在大于第二设定压力时打开。
The invention discloses a pumping system and concrete pumping equipment. The pumping system comprises a conveying pipeline, a power mechanism, a transition cylinder drawn out from the conveying pipeline, and a regulating fluid cylinder coaxial with the transition cylinder, respectively arranged in the transition The cylinder and the transition piston and the regulating piston in the regulating fluid cylinder, the connecting rod connecting the transition piston and the regulating piston, the pumping system further comprises: an accumulator for storing and releasing the fluid medium, and the accumulator has an inlet and an outlet; an intermediate pipeline comprising a first branch communicating with the inlet of the accumulator and a second branch communicating with the outlet of the accumulator; a valve assembly comprising a first check valve arranged on the first branch and a second check valve arranged on the second branch; the outlet of the first check valve is communicated with the inlet of the accumulator, and the inlet of the second check valve is communicated with the outlet of the accumulator; wherein: make the first check valve The valve opens above the first set pressure, and the second one-way valve opens above the second set pressure.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a pumping system and concrete pumping equipment.
Background
Pumping systems in concrete pumping plants are known for conveying pasty concrete from a low level to a high level, which pumping systems essentially comprise a conveying line for conveying the concrete and a power unit for providing conveying power to the concrete, which power unit is usually powered by two cylinders which are alternately extended and retracted. In the actual conveying process, it is easy to understand that the two oil cylinders can cause the pressure of the concrete in the conveying pipeline to fluctuate through alternate expansion and contraction, and the fluctuation not only generates large energy consumption, but also generates noise and vibration and influences the service life of the conveying pipeline.
In order to overcome the defects in the concrete conveying process, in the prior art, a transition adjusting cylinder is led out from one side of a conveying pipeline, an adjusting oil cylinder which is coaxial with the transition adjusting cylinder is arranged on one side of the transition adjusting cylinder, a transition piston is arranged in the transition adjusting cylinder, an adjusting piston is arranged in the adjusting oil cylinder, the transition adjusting cylinder is connected with the adjusting piston through a connecting rod, and two chambers separated by the adjusting piston in the adjusting oil cylinder are respectively connected with an external hydraulic system. The switch valve in the hydraulic system actively attenuates pressure fluctuation by actively opening or closing a chamber of the adjusting cylinder.
However, the frequency and timing of the active control of the switching valves by the hydraulic system are in many cases difficult to match and correspond to the frequency and timing of the pressure fluctuations in the concrete, which makes it very difficult and unstable to attenuate the pressure fluctuations.
To match and correspond to the frequency and timing of the pressure fluctuation of the concrete, chinese patent No. 201110177341.2 discloses a technical solution, specifically, in the technical solution, an accumulator is provided to communicate with a chamber of the adjusting cylinder (or air cylinder), the accumulator absorbs energy by the accumulator to reduce the pressure rise when the pressure of the concrete rises, and releases energy by the accumulator to compensate the pressure of the concrete when the pressure falls, the way of passively absorbing and releasing energy completely based on the pressure fluctuation of the concrete can realize the purpose of matching and corresponding to the frequency and timing of the concrete pressure fluctuation.
However, the technical solution provided by the above patent has the following disadvantages:
it is pointed out in this patent that the preset pressure of the accumulator is set to be lower than the working pressure when the concrete is delivered, that is, the accumulator is always in an open state during the delivery of the concrete, and absorbs and releases energy in real time in response to the pressure fluctuation of the concrete, so that the piston in the transition cylinder and the adjusting cylinder in the adjusting cylinder always act in real time along with the pressure fluctuation of the concrete, which may cause a large portion of the energy provided by the power mechanism in the pumping system to be consumed by the transition adjusting cylinder and the adjusting cylinder, and even the accumulator, and in addition, more seriously, the life of the transition adjusting cylinder, the adjusting cylinder, and the relevant parts in the accumulator may be greatly reduced due to the frequent real-time actions.
Disclosure of Invention
In order to solve the technical problems in the prior art, embodiments of the present invention provide a pumping system and a concrete pumping device.
In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme:
a pumping system comprises a conveying pipeline for conveying concrete, a power mechanism for providing power for conveying the concrete, a transition cylinder led out from the conveying pipeline, an adjusting fluid cylinder coaxial with the transition cylinder, a transition piston and an adjusting piston which are respectively arranged in the transition cylinder and the adjusting fluid cylinder, and a connecting rod for connecting the transition piston and the adjusting piston, and further comprises:
an accumulator for storing and releasing fluid media, the accumulator having an inlet and an outlet;
an intermediate conduit including a first branch in communication with an inlet of the accumulator and a second branch in communication with an outlet of the accumulator;
a valve assembly including a first one-way valve disposed on the first branch and a second one-way valve disposed on the second branch; the outlet of the first one-way valve is communicated with the inlet of the accumulator, and the inlet of the second one-way valve is communicated with the outlet of the accumulator; wherein:
and enabling the first one-way valve to be opened when the pressure is higher than a first set pressure, and enabling the second one-way valve to be opened when the pressure is higher than a second set pressure.
Preferably, the first and second check valves each comprise:
the valve comprises a valve body, a valve body and a valve body, wherein a cylindrical cavity is formed in the valve body, an inlet is formed at the end part of the cylindrical cavity, and an outlet is formed on the side wall of the cylindrical cavity;
the valve core is arranged in the cylindrical cavity and can slide along the cylindrical cavity so as to enable the inlet to be communicated with or cut off from the outlet;
a cylindrical core connected to the valve core;
a spring for urging the valve element toward the inlet direction;
and an electromagnetic coil for magnetically interacting with the iron core, wherein a first set pressure difference for opening the first check valve and a second set pressure difference for opening the second check valve can be changed by changing a current of the electromagnetic coil.
Preferably, the pumping system further comprises a controller and a pressure sensor;
the controller is respectively electrically connected with the first one-way valve, the second one-way valve, the pressure sensor and the power mechanism;
the pressure sensor extends into the conveying pipeline to be used for detecting the pressure of concrete in the conveying pipeline in real time and sending a detection result to the controller;
the controller analyzes the detection result and controls the first check valve based on the analysis result
And/or
The second check valve
And/or
The power mechanism is provided.
Preferably, the analysis result comprises an actual average pressure of the concrete;
when the actual average pressure is smaller than the rated pressure for conveying concrete, the controller controls the power mechanism to improve the running power of the power mechanism, and when the actual average pressure is larger than the rated pressure for conveying concrete, the controller controls the power mechanism to reduce the running power of the power mechanism.
Preferably, the analysis result further comprises a first actual pressure difference between the actual peak pressure of the concrete and the actual average pressure and a second actual pressure difference between the actual average pressure and the actual trough pressure of the concrete;
when the first actual pressure difference is less than the first rated pressure difference, the controller controls the first check valve to increase the current passing through the solenoid coil of the first check valve, and when the first actual pressure difference is greater than the first rated pressure difference, the controller controls the first check valve to decrease the current passing through the solenoid coil of the first check valve;
when the second actual pressure difference is less than the second rated pressure difference, the controller controls the second check valve to increase the current passing through the solenoid coil of the second check valve, and when the second actual pressure difference is greater than the second rated pressure difference, the controller controls the second check valve to increase the current passing through the solenoid coil of the second check valve; wherein:
the first rated pressure difference is the difference between the peak pressure of the mixed soil which is allowed to pass through the conveying pipeline and the rated pressure;
the second nominal pressure differential is the difference between the nominal pressure and the trough pressure of the mixed soil allowed to pass through the delivery line.
Preferably, the regulating fluid cylinder is a cylinder or an oil cylinder.
The invention also discloses concrete pumping equipment which comprises the pumping system.
Compared with the prior art, the pumping system and the concrete pumping equipment disclosed by the invention have the beneficial effects that:
during the concrete pressure fluctuation, the transition cylinder and the relevant parts of the adjusting fluid cylinder are operated to buffer and stabilize the pressure fluctuation only after the pressure fluctuation exceeds a certain degree, and the transition cylinder and the relevant parts of the adjusting fluid cylinder are not operated when the pressure fluctuation does not exceed a certain degree. On one hand, the pressure fluctuation of the concrete is weakened, the noise generated by the pressure fluctuation in the conveying process of the concrete is reduced, the service life of a conveying pipeline is prolonged, on the other hand, the action frequency of relevant parts such as the transition cylinder and the adjusting fluid cylinder is reduced, the real-time action of the relevant parts is avoided, the energy consumption of the relevant parts is further reduced, and the service life of the relevant parts is prolonged.
The summary of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the full scope or all features of the disclosed technology.
Drawings
In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments, by way of example and not by way of limitation, and together with the description and claims, serve to explain the inventive embodiments. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.
Fig. 1 is a schematic structural diagram of a pumping system according to an embodiment of the present invention.
Fig. 2 is a view showing a state in which a first check valve is opened in a pumping system according to an embodiment of the present invention.
Fig. 3 is an enlarged view of a portion a of fig. 2.
Fig. 4 is a view showing a state in which a first check valve is opened in a pumping system according to an embodiment of the present invention.
Fig. 5 is an enlarged view of a portion a of fig. 4.
Reference numerals:
10-a conveying pipeline; 20-a transition cylinder; 21-a transition piston; 30-a regulating fluid cylinder; 31-an adjusting piston; 40-a connecting rod; 41-a first link; 42-a second link; 43-a spring; 51-a first branch; 52-a second branch; 61-a first one-way valve; 611-an inlet; 612-an outlet; 62-a second one-way valve; 621-inlet; 622-outlet; 70-an accumulator; 71-an inlet; 72-an outlet; 80-a controller; 90-a pressure sensor; 91-a valve body; 92-a valve core; 93-columnar iron core; 94-electromagnetic coil.
Detailed Description
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the invention have been omitted.
As shown in fig. 1, an embodiment of the present invention discloses a pumping system, which belongs to a core system of concrete pumping equipment, and the system comprises: a delivery line 10, a power mechanism (not shown), a transition cylinder 20, a regulating fluid cylinder 30, a transition piston 21, a regulating piston 31, a connecting rod 40, an accumulator 70, an intermediate line, and a valve assembly.
Two parallel oil cylinders in the prior art are selected as power mechanisms, and the two oil cylinders stretch and contract alternately to provide power for the slurry concrete to flow in the conveying pipeline 10, and it is known that the concrete flowing in the conveying pipeline 10 generates pressure fluctuation due to the alternate stretching and contraction of the oil cylinders, that is, the pressure of the mixed soil generates pressure fluctuation with wave crests and wave troughs.
Generally, under the condition that parameters such as the operation power of the power mechanism and the texture (such as viscosity) of the concrete are not changed, the law of the pressure fluctuation of the concrete is not changed, and then the rated pressure and the peak and trough pressures of the mixed soil can be obtained through tests and calculation, for example, the median pressure (average pressure) between the peak pressure and the trough pressure is calculated as the rated pressure based on some calculation rules.
The transition cylinder 20 is led out from one side of the conveying pipeline 10, the adjusting fluid cylinder 30 is positioned at one side of the transition cylinder 20 and is coaxial with the transition cylinder 20, the transition piston 21 is arranged in the transition cylinder 20, concrete in the conveying pipeline 10 can enter a cavity blocked by the transition piston 21, the adjusting piston 31 is arranged in the adjusting fluid cylinder 30, the adjusting piston 31 divides the adjusting fluid cylinder 30 into two cavities, the cavity closer to the transition cylinder 20 is communicated with the atmosphere, and the cavity far from the transition cylinder 20 is closed and is provided with an interface.
The connecting rod 40 is located between the transition piston 21 and the adjusting piston 31, and both ends of the connecting rod 40 are connected to the transition piston 21 and the adjusting piston 31, respectively, which enables the transition piston 21 and the adjusting piston 31 to be driven mutually by the connecting rod 40.
A pneumatic accumulator 70 is selected as the accumulator 70 and a gas cylinder is selected as the conditioning fluid cylinder 30, the chamber of which remote from the transition cylinder 20 is closed with gas. The accumulator 70 has an inlet 71 and an outlet 72, the gas entering through the inlet 71 storing energy and the outlet 72 being used to vent the gas to release energy.
The intermediate circuit comprises a first branch 51 and a second branch 52, the first ends of both the first and second branches 51, 52 communicating with the interface of the regulating cylinder 30, the second end of the first branch 51 communicating with the inlet 71 of the accumulator 70, the second end of the second branch 52 communicating with the outlet 72 of the accumulator 70.
As shown in fig. 2 to 5, the valve assembly includes a first check valve 61 and a second check valve 62, an outlet 612 of the first check valve 61 communicates with an inlet 71 of the accumulator 70, and an inlet 621 of the second check valve 62 communicates with an outlet 72 of the accumulator 70.
The two check valves have substantially the same structure, and each of them includes a valve body 91, a valve spool 92, a columnar iron core 93, a return spring, and an electromagnetic coil 94. The valve body 91 has a cylindrical chamber formed therein, and the inlet ports 611, 621 of the first and second check valves 61, 62 are formed at the ends of the cylindrical chamber, while the outlet ports 612,622 of the first and second check valves 61, 62 are formed on the side walls of the cylindrical chamber. The valve core 92 is disposed in the cylindrical cavity and can slide along the cylindrical cavity, the spring is used for pushing the valve core 92 towards the inlet direction, the cylindrical iron core 93 is connected to the tail portion of the valve core 92, the electromagnetic coil 94 surrounds the cylindrical iron core 93, and different currents are introduced to the electromagnetic coil 94 so that the electromagnetic coil 94 acts on the cylindrical iron core 93 in the axial direction with different magnetic forces, and the valve core 92 has different opening pressures.
Based on the above, the gas in the chamber in the regulating fluid cylinder 30 can only enter the accumulator 70 through the first check valve 61, whereas the gas in the accumulator 70 can only enter the chamber of the regulating fluid cylinder 30 through the second check valve 62.
In the present invention, the inlet pressure of the first check valve 61 is made to open when it is greater than the first set pressure, and the inlet pressure of the second check valve 62 is made to open when it is greater than the second set pressure.
It should be noted that:
1. the first set pressure and the second set pressure are artificially set pressures, and the set rule is as follows: the transition piston 21 and the adjusting piston 31 are made to have the same cross section; a certain pressure P1 between the peak pressure and the rated pressure of the concrete is a first set pressure; a certain pressure P2 between the rated pressure and the valley pressure is the second set pressure.
2. The working pressure of the accumulator 70 is made substantially equal to the rated pressure of the concrete.
Based on the above, when the pressure of the concrete in the delivery pipe 10 rises but is still less than the pressure P1, the first check valve 61 will not open, and the transition piston 21 and the adjusting piston 31 will not act; as shown in fig. 2 and 3, when the pressure of the concrete in the delivery pipe 10 rises and exceeds the pressure P1, the first check valve 61 opens, the transition piston 21 and the adjusting piston 31 move to the right, the gas in the chamber of the adjusting cylinder 30 flows to the accumulator 70, and the accumulator 70 stores energy, at which point the pressure of the concrete hardly rises or rises to a very small extent.
When the pressure of the concrete in the delivery pipe 10 drops and is still higher than the pressure P2, the second check valve 62 will not open, and the adjusting piston 31 and the transition piston 21 will not act; when the pressure of the concrete in the delivery line 10 drops below the pressure P2, as shown in fig. 4 and 5, at which point the second non return valve 62 opens, gas flows from the accumulator 70 into the chamber of the adjustment fluid cylinder 30 to push against the adjustment piston 31, so that the adjustment piston 31 and the transition piston 21 move to the left, which causes the pressure of the concrete not to drop.
The pumping system provided by the invention has the advantages that:
during concrete pressure fluctuations, the transition cylinder 20 and the associated components of the adjusting fluid cylinder 30 are actuated to dampen and stabilize the pressure fluctuations only after the pressure fluctuations exceed a certain level, while the transition cylinder 20 and the associated components of the adjusting fluid cylinder 30 are not actuated when the pressure fluctuations do not exceed a certain level. On one hand, the pressure fluctuation of the concrete is weakened, the noise generated by the pressure fluctuation in the conveying process of the concrete is reduced, the service life of the conveying pipeline 10 is prolonged, and on the other hand, the action frequency of relevant parts such as the transition cylinder 20 and the adjusting fluid cylinder 30 is reduced, the real-time action of the relevant parts is avoided, the energy consumption of the relevant parts is further reduced, and the service life of the relevant parts is prolonged.
It should be noted that: the purpose of the method is to weaken the pressure of the wave crests and the wave troughs of the pressure fluctuation, and after the pressure of the wave crests and the wave troughs is weakened through the method, the concrete does not have great adverse effects on the concrete conveying process due to the fluctuation in a relatively reasonable pressure range.
The pumping system of the above structure also has the following advantages:
the degree of attenuation of the peaks and valleys can be adjusted by adjusting the current through the solenoid 94 on the first and second check valves 61 and 62.
For example, when a greater degree of attenuation of the wave peak is desired, the current through the solenoid 94 of the first check valve 61 may be reduced so that when the pressure of the concrete rises to a lower level, the gas in the regulating fluid cylinder 30 overcomes the magnetic force of the first check valve 61 and causes the first check valve 61 to open, thereby allowing the gas to enter the accumulator 70 so that the concrete does not rise any more when the pressure rises to a higher level.
For example, when a smaller degree of weakening of the wave peak is required, the current through the solenoid 94 of the first check valve 61 may be increased, so that when the pressure of the concrete rises to a higher degree, the gas in the regulating fluid cylinder 30 can overcome the magnetic force of the first check valve 61 and open the first check valve 61, so that the gas enters the accumulator 70, and the pressure of the concrete does not rise any more when it rises to a higher degree.
For another example, when a greater degree of weakening of the trough is desired, the current through the solenoid 94 of the second check valve 62 may be reduced so that, when the pressure drop of the concrete is low, the gas in the accumulator 70 overcomes the magnetic force of the second check valve 62 to open the second check valve 62, thereby allowing the gas to enter the regulating cylinder 30, and thus allowing the concrete to no longer drop when the pressure drops to only a small degree.
For another example, when a lesser degree of weakening of the trough is desired, the current through the solenoid 94 of the second check valve 62 may be increased so that when the pressure of the concrete drops to a greater degree, the gas in the accumulator 70 can overcome the magnetic force in the second check valve 62 and cause the second check valve 62 to open, allowing gas to enter and gas to enter the regulating cylinder 30, and thus causing the pressure of the concrete to drop to a greater degree without dropping.
In fact, even if the parameters of the power mechanism and the texture of the concrete are known, the rated pressure and the fluctuation degree of the concrete are not determined, for example, the actual average pressure of the concrete may be smaller than the rated pressure for conveying the concrete, and the actual fluctuation degree of the concrete is not consistent with the allowable rated fluctuation degree.
To this end, in some preferred embodiments, the pumping system further comprises a controller 80 and a pressure sensor 90; the controller 80 is electrically connected with the first one-way valve 61, the second one-way valve 62, the pressure sensor 90 and the power mechanism respectively; the pressure sensor 90 extends into the conveying pipeline 10 for detecting the pressure of the concrete in the conveying pipeline 10 in real time and sending the detection result to the controller 80; the controller 80 analyzes the detection result and controls the first check valve 61, the second check valve 62, and the power mechanism based on the analysis result. The analysis result comprises an actual average pressure, a first actual pressure difference and a second actual pressure difference.
Wherein:
the actual average pressure is the average of the pressures obtained over several consecutive periods of pressure fluctuation across the pressure sensor 90, which represents the actual operating pressure of the pumping system.
The first actual pressure difference is the difference between the actual peak pressure and the actual average pressure of the concrete, and represents the fluctuation degree of the pressure of the concrete to fluctuate upwards.
The second actual pressure difference is the difference between the actual average pressure and the actual trough pressure of the concrete, and represents the fluctuation degree of the pressure of the concrete.
The first rated pressure difference is the difference between the peak pressure of the mixed soil which is allowed to pass through the conveying pipeline 10 and the rated pressure, and is smaller than the first rated pressure difference, so that the concrete conveying process is not greatly influenced. And a pressure difference greater than the first pressure difference may have a great adverse effect on the concrete conveying process, such as noise generation, and a great reduction in the service life of the conveying pipe 10.
The second nominal pressure differential is the difference between the nominal pressure and the trough pressure of the mixed soil that is allowed to pass through the transfer line 10. And the pressure difference is less than the second rated pressure difference, so that the concrete conveying process is not greatly influenced. And a pressure difference greater than the first pressure difference may have a great adverse effect on the concrete conveying process, such as noise generation, a great reduction in the service life of the conveying pipe 10, and a lack of instantaneous concrete conveying power.
The controller 80 performs the following control based on the actual pressure difference and the rated pressure difference:
when the first actual pressure difference is smaller than the first rated pressure difference, which indicates that the fluctuation degree of the upward fluctuation of the concrete is small, the controller 80 controls the first check valve 61 to increase the current passing through the solenoid coil 94 of the first check valve 61, so as to attenuate the peak to a small extent, thereby making it possible to reduce the operation frequency of the transition cylinder 20 and the relevant components of the adjustment cylinder 30 as much as possible.
When the first actual pressure difference is greater than the first rated pressure difference, which indicates that the fluctuation degree of the upward fluctuation of the concrete is large, the controller 80 controls the first check valve 61 to reduce the current passing through the electromagnetic coil 94 of the first check valve 61, so as to weaken the wave peak to a large extent, and further, to avoid the large noise caused by the excessive pressure fluctuation and shorten the service life of the conveying pipeline 10 as much as possible.
When the second actual pressure difference is smaller than the second rated pressure difference, which indicates that the fluctuation degree of the downward fluctuation of the concrete is small, the controller 80 controls the second check valve 62 to increase the current passing through the solenoid 94 of the second check valve 62, so as to weaken the trough of the concrete to a small degree, thereby minimizing the operation frequency of the transition cylinder 20 and the related components of the adjustment cylinder 30.
When the second actual pressure difference is greater than the second rated pressure difference, which indicates that the fluctuation degree of the downward fluctuation of the concrete is large, the controller 80 controls the second check valve 62 to increase the current passing through the electromagnetic coil 94 of the second check valve 62, so as to weaken the trough to a large extent, thereby avoiding as much noise as possible due to excessive pressure fluctuation and shortening the service life of the conveying pipeline 10.
In some preferred embodiments, the link 40 includes a first link 41, a second link 42, and a spring 43 disposed between the first link 41 and the second link 42, such that the spring 43 is maintained in a certain compressed state.
The node at which the spring yields is set as:
when the concrete pressure is greater than the pressure P1, the spring begins to yield, so that the transition piston 21 in the transition cylinder 20 can move more rapidly to the right under the action of the yielding of the spring and the opening of the first non-return valve 61, attenuating the peaks of the pressure fluctuations more sensitively.
Moreover, although exemplary embodiments have been described herein, the scope of the present invention includes any and all embodiments based on the present invention with equivalent elements, modifications, omissions, combinations (e.g., of various embodiments across), adaptations or alterations. The elements of the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the present specification or during the prosecution of the application, which examples are to be construed as non-exclusive. It is intended, therefore, that the specification and examples be considered as exemplary only, with a true scope and spirit being indicated by the following claims and their full scope of equivalents.
The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more versions thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. In addition, in the above-described embodiments, various features may be grouped together to streamline the disclosure. This should not be interpreted as an intention that a disclosed feature not claimed is essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110154906.9A CN112814865A (en) | 2021-02-04 | 2021-02-04 | Pumping system and concrete pumping equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110154906.9A CN112814865A (en) | 2021-02-04 | 2021-02-04 | Pumping system and concrete pumping equipment |
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| TWI771067B (en) * | 2021-06-18 | 2022-07-11 | 潤弘精密工程事業股份有限公司 | Concrete pumping device and method of pumping concrete |
| AT528202A4 (en) * | 2024-08-12 | 2025-11-15 | Univ Innsbruck | CONCRETE SPRAYER AND PULSATION DAMPER |
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